Are you sure it has step inputs
Most servo amps need +/- 10v
Can anyone tell me the Voltage input for step inputs? at the connector? I have no indexer and am trying to run the pulse at 5V no luck. Where might I find a schematic for this
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Are you sure it has step inputs
Most servo amps need +/- 10v
Yes it is step and direction. It has an internal oscillator that you can hook up the step input to and the drive works fine. I can't however determine the voltage I don't have a scope. I am trying to run it from Mach2, with a soundlogid reakkout board.=b step and direction 5V setting on the step. I have tested the PC side and the sound logic breakout board with another (PacSci) drive that takes a 5V step input and it works fine. So I know the setup is good. I just cant get the SD3 to respond to the 5V. I have a feeling that it needs 12v on the input and the drive is taking that to 5V TLL level on the board. I am just not sure. Unfortunately I am not an electrical engineer, and can't get to board level with my current understanding. The book states the indexer is sending 12V. I dont have the indexer board, and can't find one
K
Hi Ken,
Maybe I can help. I use the Parker Digiplan PK2 drives on my mini-lathe. They need a 12v signal to work. You can take the 5v up to 12v with a 3.3k resistor and a 2N3904 Transistor on each line. I attached a diagram from my manual, hope it shows up. I can't say that this will work for yours, but it sounds like it will.
Tim
Hey! thanks so much. I think i can put this together. You are a lifesaver. I will let you know how it works out.
Ken
Hi, I am trying to convert a 5v pulse to 12v. do i need to connect 12v to the circuit and where.
thanks harry
If its to drive the SD3 all you need is an open collector drive as the SD3 has pullups to +12V
You can use discrete transistor or a 7406 or uln2803
Regards
Anthony